You dare bring up my name?
Okay lets do some humiliating, since you asked for it.
These scales are done by no other than bias lion hating tiger fanatics, I can't even call them fans of tigers since they soil the tigers good, name, the tiger already has the title as the heaviest cat, he doesnt need anyone over exagerating his status, but when you say heaviest, you can't automatically say largest, since a 6' foot man at 300 pounds will look larger than a 5'5 man whos 320 lbs.
So lets show some credible stuff.
~John Seidensticker, Ph.D. Scientist Zoological Park in Washington, D.C:
http://mysite.verizon.net/johnseidensticker/
"Tigers are similar in size to lions, although tigers have shorter legs"
(Weights including all Sub-speices from Biologist)
Tigers weigh less than lions on average (Kitchener and Yamaguchi 2010)
* Average adult male lion: 175 kg (386 lb)
* Average adult male tiger: 160 kg (353 lb)
http://library.sandiegozoo.org/factsheets/tiger/tiger.htm
That would mean, the tiger on average is much shorter then the lion, and not needing to have a half ass photo shoped re-scaling, the averae tiger would look like this:
Even female lions are taller than male tigers.
(Nala and Detonator)
The mane makes the lion 2x bigger in size compared to tigers, the mane is what makes lions look the same size as 1,000 lb grizzly bears, tigers have 9 sub-species and they average 350 lbs as a whole speices.
Size, on average its not even close: Bear>Lion>Tiger
No Biologist on earth with a Ph.D is going to say tigers are larger and heavier than lions on average, as goes, the largest sub-speices in the wild and captivity is at a toss up when comparing the two ...yeah, its that close, but when we speak of them as a species, Panthera leo is heavier, larger, taller and bigger in overall size.